Python 的多线程没有提供停止的方法，解决办法

谁践踏了优雅 2022-05-16 01:44 164阅读 0赞

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def stop_smon():
    
        # 文件存在则停止线程
        print "停止检测中"
        # base_dir = os.path.join(os.path.dirname(__file__))
        # base_dir = os.path.dirname(os.path.realpath('__file__'))
        # 获取当前的目录
        base_dir = os.getcwd()
        print base_dir
        path = os.path.join(base_dir, 'stop')
    
        if not os.path.exists(path):
            # 查询所有的线程
            list = threading.enumerate()
            # os.remove(os.path.join(base_dir, 'stop'))
            for i in list:
                # 传递解释器退出异常
                _async_raise(i.ident, SystemExit)
        t = threading.Timer(5, stop_smon)
        t.start()
    
    def _async_raise(tid, exctype):
        """raises the exception, performs cleanup if needed"""
        tid = ctypes.c_long(tid)
        if not inspect.isclass(exctype):
            exctype = type(exctype)
        res = ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, ctypes.py_object(exctype))
        if res == 0:
            raise ValueError("invalid thread id")
        elif res != 1:
            # """if it returns a number greater than one, you're in trouble,
            # and you should call it again with exc=NULL to revert the effect"""
            ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, None)
            raise SystemError("PyThreadState_SetAsyncExc failed")

删除文件stop之后就会，使用 threading.enumerate()方法查询所有的线程，返回的是一个列表，通过该列表获取线程对象，ident方法获取该线程对象的标识符，同时传递SystemExit解释器请求退出.ctypes把参数转成相应的c\_\*\*\*类型.触发异常强制停止线程

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